Closer sagittal and meridional chart lines indicate more 'natural' out of focus areas.

Remember that MTF charts are good for comparing similar lenses, so comparing ones from the 14mm f2.8L and 300mm 2.8L won't tell you much at all, whilst comparing the EF14 2.8L with the EF14 2.8L II will show meaningful differences. Note that other manufacturers may have different ways of displaying such information that may or may not match up with the Canon figures.

Sample images

No available at present.

Product launch

MELVILLE, N.Y., May 13, 2014 – Canon U.S.A., Inc., a leader in digital imaging solutions, is proud to announce two new wide-angle lenses. The introduction of the new Canon EF 16-35mm f/4L IS USM and the EF-S 10-18mm f/4.5-5.6 IS STM wide-angle zoom lenses provides Canon digital SLR camera users with the ability to capture stunning photographs and videos of spacious landscapes and many other iconic scenes.

The EF 16-35mm f/4L IS USM lens is the first L-series wide-angle zoom lens equipped with image stabilization, providing professional photographers with expanded creative options, especially in low light.

"Having just reached a milestone of producing 100 million EF lenses, Canon is dedicated more than ever before to its heritage of creating outstanding optics for photographers of all levels," said Yuichi Ishizuka, president and COO, Canon U.S.A., Inc. "The EF 16-35mm f/4L IS USM and EF-S 10-18mm f/4.5-5.6 IS STM ultra-wide zoom lenses, when paired with Canon EOS Digital SLR cameras, are powerful tools that can enhance any photographer's creativity. And new to the U.S. market, the white EOS Rebel SL1 Digital SLR camera with its companion white lens, provides users with high-quality images in a small, compact body that is easy to bring along on all their summer adventures."

Fully compatible with all EOS Digital SLR cameras including full-frame models like the EOS 5D Mark III and EOS 6D Digital SLR cameras, the compact and lightweight EF 16-35mm f/4L IS USM ultra wide-angle zoom lens offers high image quality and an Optical Image Stabilizer (IS) for shake correction up to four shutter speed stepsii, making handheld shooting possible in dimly lit scenes where camera shake can occur. In addition, an intelligent CPU in the lens automatically selects the optimal IS mode by recognizing differences between normal handheld shots and panning. This technological advancement supports a greater range of creative expression for photographers in otherwise difficult shooting situations, such as dark indoor scenes where flash photography is prohibited, or in places where a tripod cannot be used, or when shooting at low ISO speeds.

The EF 16-35mm f/4L IS USM ultra wide-angle zoom lens features newly developed, high quality Canon optics that incorporate three GMo (Glass-Molded) aspheric lens elements, including a large-diameter aspheric lens, which help improve image quality by correcting aberrations. Two additional UD lens elements help reduce chromatic aberration from edge to edge throughout the entire zoom range for excellent image quality with high resolution and contrast. The lens also features enhanced fluorine lens coatings on the front and rear lens surfaces to repel dust particles and help ensure superb color balance while minimizing ghosting. The inner focusing and ring USM offer silent, fast and accurate autofocusing. Full-time manual focus adjustment is available in autofocus (AF) mode. A nine-blade circular aperture creates beautiful, soft backgrounds. A new compact four-group zoom system provides a minimum focusing distance of 0.28m/11 inches throughout the zoom range and a maximum magnification of 0.23x at the telephoto end for outstanding performance.

New Lens Availability

The Canon EF 16-35mm f/4L IS USM and the EF-S 10-18mm f/4.5-5.6 IS STM ultra-wide zoom lenses are scheduled to be available in June for estimated retail prices of $1,199.00 and $299.99, respectively. For more information about Canon EF Lenses visit: www.usa.canon.com/cusa/consumer/products/cameras/ef_lens_lineup.

United Kingdom, Republic of Ireland, 13 May 2014 – Canon today introduces two new high-performance, wide-angle zoom lenses to its EF range – the EF16-35mm f/4L IS USM and EF-S 10-18mm f/4.5-5.6 IS STM. Designed for experts and enthusiasts, the EF 16-35mm f/4L IS USM is a professional quality L-series lens, offering exceptional performance throughout the zoom range. The compact and lightweight EF-S 10-18mm f/4.5-5.6 IS STM is for Canon’s consumer range of

APS-C sensor EOS DSLRs, and ideal is for people who want to expand their view and get more into each shot – with both optical IS and STM technologies helping to deliver consistently sharp and crisp wide-angle stills and HD movies.

High-precision, high-performance, wide-angle view – the EF 16 35mm f/4L IS USM.
The EF 16-35mm f/4L IS USM provides greater versatility for professionals and keen enthusiasts who regularly capture wide-angle perspectives – such as landscape or architecture photographers – or those who typically shoot in confined spaces. The lens offers wide-ranging flexibility, with first-class optical construction and a fixed f/4 aperture providing clear, sharp results even in the most challenging situations.

The new EF 16-35mm f/4L IS USM is Canon’s first ultra-wide L-series lens to feature Canon’s signature optical Image Stabilizer (IS) technology, which offers a four-stop advantage over non-IS lenses and helps to ensure that shots are always captured with precision detail. The newly-designed IS system also features a number of additional improvements, including gyro sensors for greater accuracy in traditional shooting or when capturing panning motion.

First class optical technologies and design
Photographers can quickly achieve focus using the powerful,fast and silent autofocusing (AF) performance of Canon’s pioneering ring-type Ultrasonic Motor (USM) – ideal when shooting in AI Servo AF mode. Complete control over image composition is also possible using the lens’s full-time focus ring in manual and AF modes, giving photographers the freedom to fine tune focus on demand.

Designed to deliver the highest image quality, the lens’s optical structure includes two Ultra-low Dispersion (UD) elements to minimise chromatic aberration and eliminate colour blurring. Super Spectra Coatings reduce ghosting and flare, while fluorine coatings on the front and rear elements prevent dust and water drops sticking to each element. Photographers can also enjoy beautiful background blur and bokeh thanks to the lens’s 9-blade circular aperture.

The lens’s exterior is optimised to provide exceptional ease of-use and professional performance. The high-grade design includes a compact and lightweight shape that’s comfortable to hold, whilst providing intuitive access to the zoom and focus control. A leather-texture coating also provides a professional feel.